I have been using the dynamic code evaluation for dynamic loading of my changed classes in my Jboss server ,
I have found this tool very helpful and interesting , but it have a problem that it works with jdk 1.6 , but As i am trying to use java 7 in my project it fails .
Can anyone suggest similar type of tool with java7 support
I suggest using... the Dynamic Code Evolution VM for Java 7 :) The DCEVM web site is not up to date and the version available for download there doesn't work with the latest versions of Java 7. For some time the Mercurial repository contained a more recent version and it has been eventually forked on Github where binaries for Windows and Linux are provided. On Debian/Ubuntu DCEVM is also available after installing the openjdk-7-jre-dcevm package.
Related
I am getting following error while running /tmp/jprofiler8/bin/jpenable
No suitable Java Virtual Machine could be found on your system.
The version of the JVM must be at least 1.6 and at most 1.7.
Please define INSTALL4J_JAVA_HOME to point to a suitable JVM.
You can also try to delete the JVM cache file
I have also set INSTALL4J_JAVA_HOME to point to suitable JVM.
Java version on my machine is 1.4.2.
Can anyone please suggest what might be wrong or missing?
Unfortunately you did not mention details about your environment, so I don't know which Linux distribution you use.
There are some options though:
install a current JRE alongside the installer for JProfiler
As you can't install or update Java, you could provide a JRE in a kind of "portable application" setup. Simply unzip the server jre Oracle provides or (if you are not on an x64 architecture) unzip the jdk you also can download from Oracle.
But if the code you want to profile is limited to your pre-installed Java 1.4 you will run into another problem, because as far as I know Java 1.5 is the minimum JProfiler expects
use a different machine for profiling
Unless your code depends heavily on the environment you run it in you can even take a Windows 8.1 machine and profile the code there. Code that is slow is slow on any operating system. Or make use of a different Linux computer.
I am trying to run my pharo2.0 application on CentoOS which was previously been installed in a mac. The original version is pharo2.0 so I need to run the same image CentoOS too, but I get an error which says this below :
/lib/libc.so.6: version `GLIBC_2.15' not found (required by xxxxx)
Should I be trying to upgrade the CentoOS and see if pharo2.0 works or port my whole application to a later version of pharo?
There is now a VM build especially for systems with an older libc version. In fact there is a build for Centos specifically (which has a slight variation in linkages from Debian), the latest version of which is permalinked here. See http://pharo.org/download#custom for more info.
I am newbie to web services. i am trying to generate stubs using Apache CFX on eclipse. when i try to add CFX in preferences using Windows >> Preference eclipse gives error "Invalid Type Name". i tried to change the JRE from JDK 6 to 7. change the versions of CFX but still problem persists.
Please help in resolve the problem
I found the solution. The problem because of multiple java version installed on my machine and CFX found two different versions of JAXB. I uninstalled java 7 from my machine and then it worked with java 6.
I am attempting to start Apache Geronimo using the command:
./bin/geronimo run
When I do this, it spins for a minute, issues the message "Main not found" and exits.
This article suggests that it is a system resource issue:
http://apache-geronimo.328035.n3.nabble.com/jira-Created-GERONIMO-5551-Failing-to-start-the-server-with-the-error-quot-Main-not-found-quot-td1324013.html
I have tried it on both an Amazon EC2 box (running Linux), and an Azure A1 box (running Windows Server), and I have tried the "Full Profile Release" and "Web Profile Release" of Geronimo, all with no change.
I'm at a complete loss as to what I could try. I am led to believe that the EC2 box, at the very least, should have the muscle to run Geronimo.
Any suggestions would be welcome.
Version 3 of Apache Geronimo is designed to run on JRE 1.7 instead of JRE 1.8. As stated in the other answers, the issue was caused by Geronimo being run on JRE 1.7 instead of 1.8.
You are not limited to JRE 1.7 and earlier in order to run Geronimo though. Therefore, all you have to do is to rename or copy the property jre-1.7 in the file etc/config.properties in your installation to jre-1.8. Afterwards, you should be able to run Geronimo without an error.
This has a huge benefit, since now you will be able to run programs on Geronimo that use Java 8 features.
It turns out that the issue is that I had the wrong version of the JDK installed. I had installed the most recent version (8), but Geronimo apparently won't work with that. When I instead installed version 6, everything worked fine.
I was getting the same error with Java 8. I tried the latest version of Java SE 7 and that resolved the problem. So I wouldn't use Java 6, since it is and has been out of support for awhile now (read: security issue).
I want to use iReport on ubuntu 12.04. When I try to start it, it stands still and just gives me this error:
Java HotSpot(TM) 64-Bit Server VM warning: You have loaded library /tmp/jna4023560596826437553.tmp which might have disabled stack guard. The VM will try to fix the stack guard now.
It's highly recommended that you fix the library with 'execstack -c <libfile>', or link it with '-z noexecstack'.
How can I solve this problem ?
Edit: I tried: execstack -c /tmp/jna4023560596826437553.tmp but that didn't help.
This error seems more related to a JVM problem instead of jasper. Indeed, Java 7 on linux has a feature which blocks code written in C (or other languages like Ruby etc) and linked into Java (the so-called Java Native Interface - JNI) from halting the whole VM if it’s written badly or maliciously.
So, if you're using java version 1.7, getting back to 1.6 should do the trick. But if you want to keep this version, then try a clean uninstall and re-install of java:
Uninstall,
Install
Notice that if you're not running on 1.7 , it could be a compatibility problem. Try to match the right jars required for iReport to get it work on linux.
I'm using ubuntu and I did below,
Opened the ireport.conf
and uncomment jdkhome
and added java 7 paths (since my default is java 8)
jdkhome=/home/bhanuka/Apps/jdk-7u80-linux-x64/jdk1.7.0_80